Abstract :
The Flight Dynamics Laboratory at Wright-Patterson Air Force Base, Ohio, is planning to use a microprocessor for controlling the flight and sequence of operations of ejection seats used in combat aircraft. The microprocessor would control the seat´s direction and attitude once ejected by adjusting its rocket thrust vector for a variety of flight situations. The typical ejection seat design today employs a fixed expansion-gas catapult and a fixed rocket thrust level and angle to propel the seat first out of the cockpit and then up and ahead of the aircraft. In general, the seats are designed to operate at aircraft speeds of from 0 to 600 knots to avoid both collision with the plane´s tall or excessive aerodynamic forces on the pilot in the chair, assuming the aircraft is horizontal or close to it when ejection takes place. (This may not always be the case and it may not be possible for the pilot to change the flight angle if the craft´s controls are damaged. Also there may not be enough time to maneuver the plane or slow down to a safe ejection speed.)
